Ultima Weapon Sighted

"There exists a weapon to destroy the Twelve themselves... FFXIV's Ultima Weapon rejoins the fray in multiplayer together with new ★5 quests!"

- Game text from the May 2018 return appearance.

Ultima Weapon Sighted (or FFXIV's Ultima Weapon) is a high-end multiplayer challenge event. Four players pit themselves against Final Fantasy XIV's superboss, The Ultima Weapon (Sicarius). The battle is a single, brutal fight at ★3 to ★5 difficulties.

Event Details

 * First appearance: 9 June - 12 July, 2017
 * Second appearance: 1 May - 31 May, 2018

How to participate
Go to the Ring of Braves from the World Map. Find a party against The Ultima Weapon of ★3 to ★5 difficulty, or form a party of your own, with your choice of other players.

Available Prizes
Defeating The Ultima Weapon gains special event-only Components, tradable at the Item Exchange in the Ring of Braves for special prizes. Items are available until 1 week after the event closes, at which time any leftover Ultimate Weapon components convert to other (light-based?) components.

Defeat FFXIV's Ultima Weapon Campaign
With the return of The Ultima Weapon in May 2018, Square included a collective campaign to defeat The Ultima Weapon. The more times players defeat The Ultima Weapon by May 15, the more prizes all players would receive as a reward. A tally board tracking the number of victories against The Ultima Weapon was placed next to Meia in the Ring of Braves front plaza.
 * May 1-15, 2018

Reference

 * Event Announcement June 2017
 * Event Announcement May 2018
 * The Ultima Weapon (Sicarius)